Derrick.



V. O. BARLOW & J. HOLMAN. DERRICK. APPLICATION FILED 0M. 24, 1910.

1,024,665. Patented Apr. 30, I912.

2 SHBETS-SHEET 1.

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Attorneys lnv ors.

.' v. 0. BARLOW & J. HOLMAN.

DERRICK.

APPLICATION IILBD 0011.24, 1910.

Patented Apr. 30, 1912.

2 SHEETS-SHEET 2.

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VANESS 0. BARLOW AND JOHN HOLMAN, 0F OARNEY, MICHIGAN.

DERRICK.

Specification of Letters Patent.

Patented Apr. 30, 1912.

Application filed October 24, 1910. Serial No. 588,874.

To all whom it may concern:

Be it known that we, VANEss O. BARLow and JOHN HOLMAN, citizens of theUnited States, residing at Carney, in the county of Menominee, State ofMichigan, have invented a new and useful Derrick, of which the followingis a specification.

This invention has relation to a derrick and it consists in the novelconstruction and arrangement of its parts as hereinafter shown anddescribed.

The object of the invention is to provide in a derrick structure, asectional mast with means for tilting and securing the mast at a desiredangle with relation to the base of the structure. The sections of themast are pivotally connected together, and means are provided forswinging and securing the upper mast section upon the lower sectionthereof whereby the structure may be extended or collapsed as desired.

In the accompanying drawings,Figure l is an'edge elevation of thederrick showing the parts extended. Fig. 2 is a side elevation of thederrick showing the parts ex tended. Fig. 3 is an edge elevation of thederrick showing the upper mast section collapsed or swung down.

The derrick comprises a base 1 which consists of parallel runners 2connected together by a cross bar 3 and cross braces 4: which arelocated in the vicinity of the ends of the said runners. Parallel mastsections 5 are pivotally connected at their lower ends with one end ofthe cross bar 3 or but one of the runners 2. The upper portions of themast sections 5 are connected together by means of a cross plate 6. Theend portions of a yoke 7 are pivotally connected with the upper portionsof the mast section 5 and a longitudinally extensible brace 8 connectedat one end with the said yoke and at its other end with the end portionof the cross bar 3 opposite the end thereof to which the lower ends ofthe mast sections 5 are pivoted. The brace 8 is composed of sect-ionswhich are adjustably secured together by means of a clamp bolt and slotconnection indicated at 9 in Fig. 1 of the drawings. Bracing rods 10 areconnected at their upper ends-with the sides of the mast sections 5 andat their lower ends with the end portions of one of the runners 2 andare provided with turn buckles 11 of usual pattern.

A mast section 12 is pivoted upon a cross pin 13 which passestransversely through the upper portions of the mast sections 5 and theend portion of the mast section 12 is located between the said mastsections 5. A sheave 14 is journaled at the upper end of the mastsection 12. A drag cable 15 is fixed at one end to the upper end of themast 12 and may be attached at its other end portion to any fixedobject. A pulley block 16 is mounted upon the cross bar 3 and a hoistingcable 17 passes under the pulley of the block 16 thence up and over thesheave 14: and thence down and up and is secured at one end to the upperportion of the mast section 12. In its return bend the hoisting cable 17carries a hook block 18 of the usual pattern. A sheave 19 is journaledfor rotation in the upper portions of the mast section 5 and a windingdrum 20 is journaled between the lower portions of the said mast section5. A crank handle 21 is attached to the shaft of the winding drum 20. Acable 22 is arranged to wind upon the drum 20 and passes over the sheave19 and is connected at its upper end with the outer lower portion of themast section 12. A cable hook 23 is fixed to the side of the upperportion of one of the mast sections 5.

\Vhen the cable 22 is wound upon the drum 20, the mast section 12 isswung up into the same plane as that in which the mast section 5 may beand the inner lower portion of the mast section 12 will be brought intocontact with the cross plate 6. Then by lengthening or shortening thelongitudinally extensible brace 8, the mast section may be pitched atany desired angle with relation to the base 1. When the parts are thuspositioned the structure as an entity is braced by the cable 15 whichmay be attached at its lower portion to an object as for instance astump 2 1. When the derrick is so positioned the hoisting cable 17 maybe readily used for hoisting or load ing heavy objects. When thestructure is not in use or when it is being transported from one pointto another, the cable 22 is unwound from the drum 20, and by drawingdown upon the cable 15 the upper end portion of the mast section 12 willbe swung down toward the platform 1 and the inter mediate portions ofthe cables 15 and 17 may be engaged with the cable hook 23. Also byshortening the extensible brace 8, the mast sections 5 and 12 may bepositioned at approximately equal angles over the base 1. Therefore itwill be seen that when the parts are collapsed, as indicated, thestructure will occupy comparatively small space.

Having described the invention what is claimed is 1. A derrick,comprising a base, a pair of spaced mast sections having their lowerends pivoted to the base, adjustable braces connected to the sides andrear of the mast sections and base, a vertically movable top mastsection, and flexible means for raising said top mast section andholding it as an extension of the spaced mast sections.

2. A derrick, comprising a base, a pair oi. spaced lower mast sect-ionsheld spaced apart at their upper ends, and pivoted at their lower endsto the base, an adjustable brace connected to each member thereof andthe base an extensible brace connected to the base and the upper end ofthe sec tions and operating in a direction of the pivotal movement ofthe sections, a top mast section, and means connected to said top mastsection and the spaced sections for elevating and locking the top mastsection in elevated position.

The combination with a portable support, of a spaced mast section havingits lower end pivoted for movement transverse of said support, anextensible brace pivotally connected at its respective ends to thesupport and section, means for extending and retracting the sections ofsaid brace to permit various angles of the mast section to the support,side brace rods connected to the support and to the mast section, asecond mast section pivotally connected near one end between the membersof the spaced mast section and having a movement from the inclined orcollapsed position to an alined or extended position, a winding drumdisposed between the spaced mast section, and a flexible connectionbetween said drum and the short end of the swinging mast section formoving the swinging section from an inclined to an alined position.

In testimony that we claim the foregoing as our own, we have heretoafiixed our signatures in the presence of two witnesses.

VANESS O. BARLOVV. JOHN I-IOLMAN.

Vitnesses as to Vaness O. Barlow:

PETER GARRIGAN, DONOLD GrARRIGAN.

W itnesses as to John Holman:

R. S. TIGGIN, J. V. BRILL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

